Thermal annealing process
An annealing and copolymer technology, which is applied in metal material coating process, photoplate making process of patterned surface, decorative art, etc., can solve the problems of ineffective thermal annealing, etc.
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Embodiment 1
[0051] Example 1: Preparation of hydroxyl-terminated polyethylene brushes
[0052] Cyclohexane (1500 g) was added in a 2 liter glass reactor under nitrogen atmosphere. Styrene (50.34 g) was then added to the reactor via cannula. The contents of the reactor were then heated to 40°C. A solution of sec-butyllithium (19.18 g) diluted at 0.32M in cyclohexane was then rapidly added to the reactor via cannula, causing the contents of the reactor to turn yellow. The contents of the reactor were stirred for 30 minutes. The contents of the reactor were then cooled to 30°C. Ethylene oxide (0.73 g) was then passed into the reactor. The contents of the reactor were stirred for 15 minutes. Then 20 mL of a 1.4 M solution of HCl in methanol was added to the reactor. The polymer in the reactor was then isolated by precipitation in isopropanol at a ratio of 500 mL polymer solution / 1250 mL isopropanol. The resulting precipitate was then filtered and dried overnight in a vacuum oven at 6...
Embodiment 2
[0053] Embodiment 2: Preparation of PS-b-PDMS diblock copolymer
[0054] In a 500 mL round bottom reactor were added cyclohexane (56 g) and styrene (16.46 g) under an argon atmosphere. The contents of the reactor were then warmed to 40°C. Then 7.49 g of a 0.06 M solution of sec-butyllithium in cyclohexane was quickly added to the reactor via cannula, causing the contents of the reactor to turn yellow-orange. The contents of the reactor were then stirred for 30 minutes. A small portion of the reactor contents was then withdrawn from the reactor into a small round bottom flask containing anhydrous methanol for gel chromatography analysis of the polystyrene blocks formed. Then 22.39 g of a 21 wt % solution of freshly grown sublimated hexamethylcyclotrisiloxane in cyclohexane were transferred to the reactor. The contents of the reactor were reacted for 20 hours. Then dry tetrahydrofuran (93ml) was added to the reactor, and the reaction was continued for 7 hours. Trimethylch...
Embodiment 3
[0055] Embodiment 3: Preparation of PS-b-PDMS diblock copolymer
[0056] In a 500 mL round bottom reactor were added cyclohexane (90 mL) and styrene (18.4 g) under an argon atmosphere. Then 0.5 mL of a 1.4 M solution of sec-butyllithium in cyclohexane was added rapidly to the reactor via cannula, causing the contents of the reactor to turn yellow-orange. The contents of the reactor were then stirred for 30 minutes. A small portion of the reactor contents was then withdrawn from the reactor into a small round bottom flask containing anhydrous methanol for gel chromatography analysis of the polystyrene blocks formed. Next 2,2,5,5-tetramethyldisilafuran (337 mg) was added to the reactor. Slowly, the orange color started to disappear and after 1 hour the reactor contents were yellowish. Then 10.1 g of fresh sublimated hexamethylcyclotrisiloxane were transferred to the reactor. The reactor contents were reacted for 1.5 hours until the contents of the reactor were colorless. ...
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